One model, judged by its numbers
Celestron NexStar 5SE
Serious aperture in a tube half a metre long, on a computerised fork. The most capability per unit of storage space, at a price.
What it shows, really
These circles are simulations, computed from the aperture, the magnification and the sky — indicative, not exact. A real night also depends on the turbulence, your eyes and your experience. Closer to the truth than the photo on the box; still not a promise.
Under a suburban sky (Bortle 6), through a common 25 mm eyepiece for wide targets and a 10 mm for planets. Every circle is the true field — nothing is enlarged.
The numbers
| Aperture | 125 mm |
|---|---|
| Focal ratio | 1250 mm · f/10.0 |
| Mount | Single-arm fork, GoTo alt-az |
| Typical weight | 12 kg |
| Eyepieces | 25 mm |
| Useful magnification | 21× to 250× at 125 mm |
| Resolution (Dawes) | 0.9″ — the tightest double star this aperture can split |
| Faintest star, suburban sky | around magnitude 11.8 |
| Observed price | €950 seen 2026-08-17 |
Made for
The Moon and the planets · 5 out of 5
Aperture, focal length and tracking together — the combination high-power planetary work wants.
Nebulae, clusters and galaxies, by eye · 4 out of 5
Real aperture, though the field is narrow and f/10 makes extended nebulae hard work.
Not made for
Taking it with me · 2 out of 5
Compact for its aperture, but it is still a two-case operation.
The family it belongs to: 150–200 mm Schmidt-Cassegrain on a GoTo alt-az
What it does well
- 200 mm of aperture in something one person can carry in two pieces
- GoTo plus tracking, which matters at high power and matters more when sharing a view
- Adapts to almost anything — imaging, planetary video, visual
What it costs you
- A 200 mm Dobsonian costs a third as much and shows the same amount
- Long cooling time and a narrow field
- Batteries, hand controllers and alignment stars, every single night
Worth knowing about this model
125 mm rather than the 150 mm this class starts at, and priced as though it were larger. Listed because it is the one people ask about.
Everything about 150–200 mm Schmidt-Cassegrain on a GoTo alt-az →
Prices are observed on the date shown, never live. Links marked paid link earn us a commission and cost you nothing extra.
Where to buy
- Astroshoppaid link€853 seen 2026-08-23ships DE, FR, EU
- Amazon.frships FR
- First Light Opticsships GB
- Optique Unterlindenships FR
- Pierro Astroships FR
- Teleskop-Expressships DE, EU
1 of these 6 links earn us a commission, marked above. Sorted by price, never by what pays. How this site is funded.